India coal mining process has greatly development, many investors will invest for this coal mining industry.
In comparison to mineral concentration, coal cleaning is normally carried out at relatively coarse
sizes. However, when deep physical cleaning is carried out to produce super clean (less than 2%
ash) and ultra clean (less than 1% ash) coals, increased liberation of finely disseminated mineral
matter is required. Microscopic examination of many coals reveals that sufficient liberation may
not occur until the coal is ground finer than 20 µm.

LM series vertical mill plant an important role of coal mining process:
The raw coal material is input onto the turn table through the material input port on top of the vertical roller mill. It is then milled between the turntable and the set of vertically placed rollers, which usually consists of three tire-type rollers. The milled chips are classified with the classifier installed in the vertical roller mill. Conforming items are fed into the cyclone of the suspension preheater, while nonconforming items are returned to the table and remilled.

Features of LM series vertical mill as follows:
1. LM series vertical mill has Reliable and highly efficient waste heat recovery system to generate electric power.
2.The generated electric power can be substituted with the electric power currently consumed at
cement plant.
LM series vertical mill with a powerful dry system,the Vertical Roller Mill transmits the materials by the airstream.When the humidity of the raw materials is large ,this machine can control the tempeture of the airflow and make the products reach the specific humidity amount. It can dry the materials with 12~15％ humidity around ,while 3~4％ humidity in the dry ball mills .

Liming heavy industry supply concrete crushing and grinding plant:
During producing Concrete, most of the raw materials must be first crushed before being used to make concrete. Among these raw materials which include lime stone, clay, iron ore and coal, etc. the lime stone is of the greatest usage to make concrete. With comparatively larger particles and higher hardness, crushing the lime stone to required fineness after mining is of relatively important consequence among crushing all those raw materials. There are many crushers used in crushing these raw materials, such as jaw crusher, impact crusher, one crusher and vertical shaft impact crusher, etc. According to the raw materials’ different particles and hardness, there are several suitable crushers which can be used in the crushing.
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